Method and apparatus for user plane data transmission in wireless communication system

Abstract

The present disclosure relates to a 5G or 6G communication system for supporting a higher data transmission rate. The present disclosure relates to operations of a terminal and a base station in a wireless communication system. Specifically, the present disclosure relates to a signal processing method of a terminal registered in a first base station in a wireless communication system, the method comprising the steps of: receiving, from the first base station, a first message including first required power information; when the terminal is registered in a second base station, receiving, from the second base station, a second message including second required power information; and, when the terminal is registered in the second base station, determining a traffic transmission ratio for at least one of the first base station and the second base station on the basis of the first message and the second message.

Description

Method and device for data transmission in a user plane in a wireless communication system

[0001] This relates to a method and device for transmitting data on a user plane in a wireless communication system.

[0002] 5G mobile communication technology defines a wide frequency band to enable fast transmission speeds and new services, and can be implemented not only in frequency bands below 6 GHz ('Sub 6 GHz'), such as 3.5 gigahertz (3.5 GHz), but also in ultra-high frequency bands called millimeter waves (mmWave), such as 28 GHz and 39 GHz ('Above 6 GHz'). In addition, for 6G mobile communication technology, which is referred to as a system beyond 5G, implementation in the terahertz band (e.g., the 3 terahertz (3 THz) band at 95 GHz) is being considered to achieve transmission speeds 50 times faster and ultra-low latency reduced to one-tenth compared to 5G mobile communication technology.

[0003] In the early stages of 5G mobile communication technology, aiming to satisfy service support and performance requirements for enhanced Mobile BroadBand (eMBB), Ultra-Reliable Low-Latency Communications (URLLC), and massive Machine-Type Communications (mMTC), technologies such as beamforming and Massive MIMO to mitigate path loss and increase transmission distance in ultra-high frequency bands, support for various numerologies (such as the operation of multiple subcarrier spacings) and dynamic operation of slot formats for the efficient utilization of ultra-high frequency resources, initial access techniques to support multi-beam transmission and broadband, definition and operation of Band-Width Parts (BWP), Low Density Parity Check (LDPC) codes for high-volume data transmission, new channel coding methods such as Polar Codes for the reliable transmission of control information, and L2 pre-processing (L2 Standardization has been carried out for pre-processing, network slicing which provides a dedicated network specialized for specific services, and other methods.

[0004] Currently, discussions are underway to improve and enhance the performance of the initial 5G mobile communication technology, taking into account the services that the 5G mobile communication technology was intended to support. Additionally, standardization of the physical layer is in progress for technologies such as V2X (Vehicle-to-Everything), which helps autonomous vehicles make driving decisions and enhance user convenience based on their own location and status information transmitted by the vehicle; NR-U (New Radio Unlicensed), which aims for system operation in unlicensed bands to comply with various regulatory requirements; NR terminal low power consumption technology (UE Power Saving); Non-Terrestrial Network (NTN), which is direct terminal-satellite communication for securing coverage in areas where communication with the terrestrial network is impossible; and positioning.

[0005] In addition, standardization is underway in the field of wireless interface architecture / protocols for technologies such as the Industrial Internet of Things (IIoT) for supporting new services through linkage and convergence with other industries, Integrated Access and Backhaul (IAB) which provides nodes for expanding network service areas by integrating wireless backhaul links and access links, Mobility Enhancement including Conditional Handover and Dual Active Protocol Stack (DAPS) Handover, and 2-step Random Access (2-step RACH for NR) which simplifies random access procedures. Standardization is also underway in the field of system architecture / services for 5G baseline architectures (e.g., Service based Architecture, Service based Interface) for incorporating Network Functions Virtualization (NFV) and Software-Defined Networking (SDN) technologies, and Mobile Edge Computing (MEC), which provides services based on the location of the terminal.

[0006] When such 5G mobile communication systems are commercialized, connected devices, which are increasing explosively, will be connected to communication networks. Accordingly, it is expected that there will be a need to enhance the functionality and performance of 5G mobile communication systems and to integrate the operation of connected devices. To this end, new research is planned to be conducted on 5G performance improvement and complexity reduction, support for AI services, support for metaverse services, and drone communication using eXtended Reality (XR), Artificial Intelligence (AI), and Machine Learning (ML) to efficiently support Augmented Reality (AR), Virtual Reality (VR), and Mixed Reality (MR).

[0007] Furthermore, the advancement of these 5G mobile communication systems encompasses multi-antenna transmission technologies such as new waveforms to guarantee coverage in the terahertz band of 6G mobile communication technology, Full Dimensional MIMO (FD-MIMO), array antennas, and large-scale antennas; metamaterial-based lenses and antennas to improve terahertz band signal coverage; high-dimensional spatial multiplexing technology using OAM (Orbital Angular Momentum); and Reconfigurable Intelligent Surface (RIS) technology; as well as Full Duplex technology for enhancing frequency efficiency and system networks in 6G mobile communication technology; AI-based communication technologies that realize system optimization by utilizing satellites and AI from the design stage and internalizing end-to-end AI support functions; and the realization of services of complexity exceeding the limits of terminal computing capabilities by utilizing ultra-high-performance communication and computing resources. It could serve as a foundation for the development of next-generation distributed computing technologies.

[0008] The present disclosure proposes an effective method for transmitting Uplink User Plane data of a UE in a wireless communication system to a 3GPP 5G and 6G network, when simultaneous connection is supported by applying Core Network-based aggregation to the UE using Dual Registration.

[0009] According to one embodiment of the present disclosure, a signal processing method for a terminal registered at a first base station in a wireless communication system comprises: receiving a first message including first demand power information from the first base station; receiving a second message including second demand power information from the second base station when the terminal is registered at the second base station; and determining a traffic transmission ratio for at least one of the first base station and the second base station based on the first message and the second message when the terminal is registered at the second base station.

[0010] According to one embodiment of the present disclosure, a terminal registered at a first base station in a wireless communication system comprises: a transceiver; and a processor; wherein the processor receives a first message including first requested power information from the first base station, and when the terminal is registered at a second base station, receives a second message including second requested power information from the second base station, and when the terminal is registered at the second base station, determines a traffic transmission rate for at least one of the first base station and the second base station based on the first message and the second message.

[0011] The present disclosure enables the UE to effectively transmit Uplink User Plane data by applying CN-based aggregation to the UE.

[0012] FIG. 1 is a diagram illustrating an example of an operation principle of Dual Registration and an Aggregation operation method based on a Core Network according to one embodiment of the present disclosure.

[0013] FIG. 2 is a diagram illustrating an example of UE operation in an Uplink using aggregation between networks applying a Dual Registration method according to an embodiment of the present disclosure. (Dynamic Splitting based on UE measurements)

[0014] FIG. 3 is a diagram illustrating an example of UE operation in an Uplink using aggregation between networks applying a Dual Registration method according to an embodiment of the present disclosure. (Dynamic Splitting based on UE measurements including Time-division splitting)

[0015] FIGS. 4a and 4b illustrate an example of an operation using aggregation in the uplink when a UE moves in a 5G network according to one embodiment of the present disclosure as a network signaling flow.

[0016] FIGS. 5A and 5B illustrate an example of an operation using aggregation in the uplink when a UE moves in a 6G network according to one embodiment of the present disclosure, as a network signaling flow.

[0017] FIG. 6 is a block diagram showing an example of a terminal configuration according to one embodiment of the present disclosure.

[0018] The operating principle of the present invention will be described in detail below with reference to the attached drawings. In describing the present invention below, specific descriptions of related known functions or configurations will be omitted if it is determined that such detailed descriptions would unnecessarily obscure the essence of the invention. Furthermore, the terms described below are defined considering their functions in the present invention, and these may vary depending on the intentions or conventions of the user or operator. Therefore, their definitions should be based on the content throughout this specification.

[0019] For the same reason, some components in the attached drawings have been emphasized, omitted, or depicted schematically. Additionally, the dimensions of each component do not fully reflect their actual dimensions. Identical or corresponding components in each drawing have been assigned the same reference numbers.

[0020] The advantages and features of the present invention and the methods for achieving them will become clear by referring to the embodiments described below in detail together with the accompanying drawings. However, the present invention is not limited to the embodiments disclosed below but can be implemented in various different forms. These embodiments are provided merely to ensure that the disclosure of the present invention is complete and to fully inform those skilled in the art of the scope of the invention, and the present invention is defined only by the scope of the claims. Throughout the specification, the same reference numerals refer to the same components.

[0021] At this time, it will be understood that each block of the process flow diagrams and combinations of the flow diagrams can be executed by computer program instructions. Since these computer program instructions can be loaded into the processor of a general-purpose computer, a special-purpose computer, or other programmable data processing equipment, the computer also creates means for the instructions executed through the processor of other programmable data processing equipment to perform the functions described in the flow diagram block(s). Since these computer program instructions can also be stored in computer-available or computer-readable memory that can be directed toward the computer or other programmable data processing equipment to implement the function in a specific way, the instructions stored in such computer-available or computer-readable memory can also produce a manufactured item containing means of instruction that perform the function described in the flow diagram block(s). Since computer program instructions can be loaded onto a computer or other programmable data processing equipment, instructions that perform a series of operation steps on the computer or other programmable data processing equipment to create a process executed by the computer can also provide steps for executing the functions described in the flowchart block(s).

[0022] Additionally, each block may represent a module, segment, or part of code containing one or more executable instructions for executing a specified logical function(s). It should also be noted that in some alternative execution examples, the functions mentioned in the blocks may occur out of order. For instance, two blocks described in succession may actually be executed substantially simultaneously, or the blocks may be executed in reverse order according to their corresponding functions.

[0023] In this embodiment, the term "part" refers to a software or hardware component, such as an FPGA or ASIC, and the "part" performs certain roles. However, the meaning of "part" is not limited to software or hardware. The "part" may be configured to reside in an addressable storage medium or configured to operate one or more processors. Accordingly, as an example, the "part" includes components such as software components, object-oriented software components, class components, and task components, as well as processes, functions, attributes, procedures, subroutines, segments of program code, drivers, firmware, microcode, circuits, data, databases, data structures, tables, arrays, and variables. The functions provided within the components and "parts" may be combined into a smaller number of components and "parts" or further separated into additional components and "parts." Furthermore, the components and "parts" may be implemented to operate one or more CPUs within a device or secure multimedia card.

[0024] In the present disclosure, each of the phrases such as “A or B,” “at least one of A and B,” “at least one of A or B,” “A, B or C,” “at least one of A, B and C,” and “at least one of A, B, or C” may include any one of the items listed together in the corresponding phrase, or all possible combinations thereof. Terms such as “first,” “second,” or “first” or “second” may be used simply to distinguish a corresponding component from another corresponding component and do not limit the corresponding components in other aspects (e.g., importance or order).

[0025] Hereinafter, the base station is an entity that performs resource allocation of the terminal and may be at least one of gNode B (gNB), eNode B (eNB), Node B, BS (Base Station), wireless access unit, base station controller, or a node on the network.

[0026] A terminal may include a User Equipment (UE), a Mobile Station (MS), a cellular phone, a smartphone, a computer, or a multimedia system capable of performing communication functions.

[0027] Terms used in the following description to identify connection nodes, terms referring to network entities, terms referring to messages, terms referring to interfaces between network entities, terms referring to various identification information, etc., are examples provided for the convenience of explanation. Accordingly, the present invention is not limited to the terms described below, and other terms referring to objects having equivalent technical meanings may be used.

[0028] For the convenience of the following explanation, the present invention uses terms and names defined in the 5GS and NR specifications, which are the most recent standards defined by the 3GPP (The 3rd Generation Partnership Project) among currently existing communication standards. However, the present invention is not limited by the above terms and names and can be applied in the same way to wireless communication networks conforming to other standards. In particular, the present invention can be applied to 3GPP 5GS / NR (5th generation mobile communication standard) and 6G (6th generation mobile communication standard).

[0029] In an environment where 6G and 5G networks coexist, a 3GPP UE can connect to both networks to receive services. To achieve this, the method by which a UE registers and connects to both networks simultaneously to receive services at both times is called the Dual Registration method, and the method by which a UE registers and connects to only one network at any given moment to receive services is called the Single Registration method.

[0030] Figure 1 is a diagram illustrating the operating principle of Dual Registration and the aggregation operation method based on the Core Network.

[0031] Referring to FIG. 1(a), the UE can register with the 5G Core and establish a connection via the 5G RAN. The UE can exchange control signals and user traffic by connecting to the 5G Core via the 5G RAN. At the same time, the UE can register with the 6G Core and establish a connection via the 6G RAN. The UE can exchange control signals and user traffic by connecting to the 5G Core via the 5G RAN. Since two protocol stacks are supported simultaneously, it can be called a Dual Stack.

[0032] Referring to FIG. 1(b), in the first area (110), which is within the coverage of the 5G RAN and outside the coverage of the 6G RAN, the UE (1) is in a state where it can send and receive traffic via 5G or at any time. At this time, the 6G Mobility state of the UE (1) may be REGISTERED / IDLE / UE Unreachable or DEREGISTERED. Accordingly, the UE (1) in the first area (110) performs a Periodic Search process to periodically search for a 6G network via 6G, and when it discovers the 6G network, it can attempt Registration and Connection.

[0033] Referring to FIG. 1(b), in the second area (120), which is within the coverage of the 5G RAN and within the coverage of the 6G RAN, the UE (2) is in a state where it can send and receive traffic via 5G or at any time. In addition, the UE in the second area (120) is in a state where it can send and receive traffic via 6G or at any time.

[0034] Referring to (c) of FIG. 1, the UPF (user plane function) separates downlink traffic and transmits it to the 5G RAN and 6G RAN, and the UE (2) can aggregate the data received by the 5G RAN and 6G RAN.

[0035] Likewise, referring to (d) of FIG. 1, the UE (2) can separate Uplink traffic and transmit it to the 5G RAN and 6G RAN, and the UPF can aggregate the data received by the 5G RAN and 6G RAN.

[0036] At this time, the Downlink throughput can be increased by aggregating traffic transmitted through multiple networks. However, due to the RF Power Limit of the UE (2), there may be a limit to the increase in throughput through aggregating traffic transmitted through multiple networks for the Uplink. This is because, while throughput may increase by using multiple networks without Uplink coverage issues near the base station, Uplink coverage may decrease when transmitting through multiple networks far from the base station.

[0037] Referring to FIG. 1(b), in the third area (130), which is outside the coverage of the 5G RAN and inside the coverage of the 6G RAN, the UE (3) is in a state where it can send and receive traffic to and from the 6G at any time. On the other hand, the UE (3) performs a Periodic Search process to periodically search for a 5G network, and when it discovers the 5G network, it can attempt to register and connect.

[0038] Figure 2 illustrates the operation of a UE in the uplink using aggregation between networks applying the Dual Registration method. (Dynamic Splitting based on UE measurements)

[0039] Referring to FIG. 2(a), in the first area (110), which is within the coverage of the 5G RAN and outside the coverage of the 6G RAN, the UE (1) is in a state where it can send and receive traffic via 5G or at any time. At this time, the 6G Mobility state of the UE (1) may be REGISTERED / IDLE / UE Unreachable or DEREGISTERED. Accordingly, the UE (1) in the first area (110) performs a Periodic Search process to periodically search for a 6G network via 6G, and when it discovers the 6G network, it can attempt Registration and Connection.

[0040] In the second area (120), which is within the coverage of the 5G RAN and within the coverage of the 6G RAN, the UE (2) is in a state where it can send and receive traffic via 5G or at any time. In addition, the UE in the second area (120) is in a state where it can send and receive traffic via 6G or at any time.

[0041] In the third area (130), which is outside the coverage of the 5G RAN and inside the coverage of the 6G RAN, the UE (3) is in a state where it can send and receive traffic to and from the 6G at any time. On the other hand, the UE (3) performs a Periodic Search process to periodically search for a 5G network, and when it discovers the 5G network, it can attempt to register and connect.

[0042] Referring to FIG. 2(b), in the second area (120) which is within the coverage of the 5G RAN and the coverage of the 6G RAN, the UE (2) is in a state where it can currently send and receive traffic to and from the 5G and 6G, or send and receive traffic at any time. In one embodiment, the UE (2) receives at least one of information such as the signal-to-noise ratio (SNR), coding rate, and required power (PWR) from each of the 5G RAN and the 6G RAN, and can determine the traffic transmission ratio to each of the 5G RAN and the 6G RAN based on the performance (throughput or RTT) that can obtain maximum performance within the Power Limit of the UE (2) according to the information.

[0043] In one embodiment, the UE (2) can receive at least one of information such as the signal-to-noise ratio (SNR), coding rate, and required power (PWR) from each of the 5G RAN and the 6G RAN.

[0044] In one embodiment, the UE (2) measures the information (information such as signal-to-noise ratio (SNR), coding rate, and required power (PWR)) and the performance from the UE (2) to the UPF (at least one of UE-to-UPF throughput and round trip time (RTT)), and can determine the traffic transmission ratio to each of the 5G RAN and the 6G RAN so as to obtain maximum performance within the Power Limit limit.

[0045] In one embodiment, the UE (2) can transmit traffic in a dynamic splitting manner for each of the 5G RAN and the 6G RAN based on a determined traffic transmission rate.

[0046] In one embodiment, the UE (2) can determine the traffic transmission ratio to each 5G RAN and 6G RAN by simultaneously considering the performance to each RAN as well as the performance with the UPF (throughput or RTT). In one embodiment, the ratio can be applied to each traffic flow.

[0047] Referring to FIG. 2(c), the same Splitting method as in the second area (120) can be applied in the first area (110) or the third area (130), but the UE can recognize that the available RAN has been reduced to one and transmit using only one RAN (5G RAN or 6G RAN).

[0048] Figure 3 illustrates the operation of a UE in the uplink using aggregation between networks applying the Dual Registration method. (Dynamic Splitting based on UE measurements including Time-division splitting)

[0049] Referring to FIG. 3(a), in the first area (110), which is within the coverage of the 5G RAN and outside the coverage of the 6G RAN, the UE (1) is in a state where it can send and receive traffic via 5G or at any time. At this time, the 6G Mobility state of the UE (1) may be REGISTERED / IDLE / UE Unreachable or DEREGISTERED. Accordingly, the UE (1) in the first area (110) performs a Periodic Search process to periodically search for a 6G network via 6G, and when it discovers the 6G network, it can attempt Registration and Connection.

[0050] In the second area (120), which is within the coverage of the 5G RAN and within the coverage of the 6G RAN, the UE (2) is in a state where it can send and receive traffic via 5G or at any time. In addition, the UE in the second area (120) is in a state where it can send and receive traffic via 6G or at any time.

[0051] In the third area (130), which is outside the coverage of the 5G RAN and inside the coverage of the 6G RAN, the UE (3) is in a state where it can send and receive traffic to and from the 6G at any time. On the other hand, the UE (3) performs a Periodic Search process to periodically search for a 5G network, and when it discovers the 5G network, it can attempt to register and connect.

[0052] In a second area (120) which refers to a location within the coverage of a 5G RAN and within the coverage of a 6G RAN, the UE (2) is in a state where it can currently send and receive traffic to and from 5G and 6G, or send and receive traffic at any time. In one embodiment, the UE (2) in the second area (120) receives at least one of information such as SNR, Coding Rate, and Required Power (PWR) from each of the 5G RAN and 6G RAN, and can determine the traffic transmission rate to each of the 5G RAN and 6G RAN based on the performance (throughput or RTT) that can obtain maximum performance within the UE's Power Limit limit according to the information.

[0053] In one embodiment, the UE (2) in the second region (120) can determine the traffic transmission ratio to each 5G RAN and 6G RAN by simultaneously considering the performance to each RAN as well as the performance with the UPF (throughput or RTT). In one embodiment, the ratio can be applied to each traffic flow. In one embodiment, the UE (2) can determine the semi-static time allocation coordination between the 5G RAN and 6G RAN to be used for a certain period according to the traffic transmission ratio thus determined. In one embodiment, the UE (2) in the second region (120) can transmit all Uplink traffic through the 5G RAN during the time allocated to the 5G RAN according to the determination, and transmit all Uplink traffic through the 6G RAN during the time allocated to the 6G RAN.

[0054] Referring to Figures 3 (b) and (c), the UE (2) has the ability to transmit traffic to multiple RANs simultaneously and has resources such as antennas for this purpose. By concentrating this on one RAN at some point, it is possible to reach a longer distance or obtain higher performance with the same power, and it is also possible to consume less power when obtaining the same performance over the same distance.

[0055] Referring to FIG. 3 (b) or (c), the same Splitting method as in the second area (120) can be applied in the first area (110) or the third area (130), but in the third area (130), the UE (3) recognizes that the available RAN has been reduced to one and can transmit using only one RAN.

[0056] FIGS. 4a and 4b illustrate an example of an operation using aggregation in the uplink when a UE moves from the coverage of a 5G RAN to the coverage of a 6G RAN, as a signaling flow with the network.

[0057] Specifically, FIGS. 4a and 4b illustrate an example of a network signaling flow when the UE moves in the order of a first area (110), a second area (120), and a third area (130).

[0058] In a first area (110) that is within the coverage of a 5G RAN and outside the coverage of a 6G RAN, the 5G Mobility status of the UE may be in a REGISTERED / CONNECTED state. In the first area (110), the UE is in a state where it is currently exchanging traffic over 5G or can exchange traffic at any time. At this time, the network's UDM (5G UDM and / or 6G UDM) stores 5G information and 6G information, and the 5G information may include at least one of information such as 5GUEID, mapped 6GUEID, AMF ID, 5G PDU Session, 5G SMF ID, etc.

[0059] At this time, in the first region (110), the 6G Mobility state of the UE may be one of REGISTERED / IDLE / UE Unreachable or DEREGISTERED. The UE performs a Periodic Search process to periodically search for a 6G network, and when a 6G network is found, it may attempt to register and connect. If the periodic search period of the UE is too short, excessive power waste may occur, and if the periodic search period is too long, the in-coverage detection time may be delayed, which may reduce efficiency.

[0060] When a UE enters a second area (120) which signifies a location within the coverage of a 5G RAN and the coverage of a 6G RAN, the UE can perform a 6G network search and send a Registration Request to the 6G Core through the discovered 6G RAN. At this time, the UE may include at least one of the following information in the Registration Request: Dual Registration Capability, 6GUEID, (mapped 5G UEID). Subsequently, the 6G AMF that receives the Registration Request transmitted by the UE through the 6G RAN can transmit and receive the 6G Registration Request and 6G Registration Response with the 6G UDM and store the mapped 5G UEID and 6G AMF ID, which are information of the 6G UEID, in the 6G UDM.

[0061] After the above 6G Registration process, the UE may also proceed with the 6G PDU Session setup process. At this time, the UE may include at least one of the following information in the above 6G PDU Session setup process: Dual Registration Capability, 6GUEID, 6G PDU Session ID, and mapped 5G PDU Session. When the PDU Session setup request sent by the UE arrives at the 6G AMF via the 6G RAN, the 6G AMF can obtain the 6G SMF ID by using the mapped 5G PDU Session ID for the 5G UEID mapped to the 6G UEID as the mapped 5G SMF ID, since the 6G AMF learned the 5G SMF ID of the mapped 5G PDU Session for the 5G UEID mapped to the 6G UEID during the process of verifying the 6G UDM and subscription data earlier.

[0062] Subsequently, the 6G AMF sends a PDU Session request to the 6G SMF, and the 6G SMF recognizes that the 5G PDU Session and the 6G PDU Session are linked to each other and can proceed with the necessary 6G data path configuration with the 6G UPF. Subsequently, the 6G SMF can send a 6G PDU Session configuration response to the UE via the 6G AMF and the 6G RAN. At this time, the 6G SMF can update information regarding the PDU Session (information such as the Dual Registration Capability, 6GUEID, 6G PDU Session ID, mapped 5G PDU Session, etc.) to the 6G UDM.

[0063] Subsequently, the UE becomes able to exchange User Traffic through the 6G RAN to the 6G UPF. Since the existing UE was able to exchange User Traffic through the 5G RAN to the 5G UPF, the UE becomes capable of exchanging User Traffic simultaneously through these two paths.

[0064] The UPF separates downlink traffic and transmits it to the 5G RAN and 6G RAN, and the UE can aggregate the data received from the 5G RAN and 6G RAN. In this case, the UPF can determine the traffic transmission ratio between the 5G RAN and 6G RAN based on the throughput through the UE and each of the 5G RAN and 6G RAN. Downlink throughput can be increased by the aggregation of traffic transmitted through multiple networks.

[0065] Similarly, the UE can separate uplink traffic and transmit it to the 5G RAN and 6G RAN, and the UPF can aggregate the data received from the 5G RAN and 6G RAN. The UE receives information such as SNR, Coding Rate, and Required Power (PWR) from each of the 5G RAN and 6G RAN, and based on this information, can determine the traffic transmission ratio to each of the 5G RAN and 6G RAN based on the performance (throughput or RTT) that can obtain maximum performance within the UE's Power Limit.

[0066] In one embodiment, the UE can receive at least one of information such as the signal-to-noise ratio (SNR), coding rate, and required power (PWR) from each of the 5G RAN and the 6G RAN.

[0067] In one embodiment, the UE can measure the information (information such as signal-to-noise ratio (SNR), coding rate, and required power (PWR)) and the performance from the UE to the UPF (at least one of UE-to-UPF throughput and round trip time (RTT)).

[0068] In one embodiment, the UE can determine the traffic transmission ratio to each of the 5G RAN and 6G RAN based on the measured information and the measured performance from the UE to the UPF so as to obtain maximum performance within the UE's Power Limit limit.

[0069] In one embodiment, the UE can transmit traffic to the 5G RAN and the 6G RAN, respectively, using a dynamic splitting method based on a determined traffic transmission rate.

[0070] The UE can determine the traffic transmission ratio to each 5G RAN and 6G RAN by simultaneously considering the performance to each RAN as well as the performance with the UPF (throughput or RTT). The above ratio can be applied to each traffic flow.

[0071] The UE can determine semi-static time allocation coordination between the 5G RAN and the 6G RAN to be used for a certain period based on the traffic transmission ratio determined in this way. In one embodiment, according to the above determination, all Uplink traffic can be transmitted through the 5G RAN during the time allocated to the 5G RAN, and all Uplink traffic can be transmitted through the 6G RAN during the time allocated to the 6G RAN. In one embodiment, according to the above determination, all Uplink traffic can be transmitted through the 6G RAN during the time allocated to the 6G RAN, and all Uplink traffic can be transmitted through the 5G RAN during the time allocated to the 5G RAN. Since the UE has the ability to transmit traffic to multiple RANs simultaneously, it possesses resources such as antennas for this purpose; by concentrating these resources on a single RAN at a certain point in time, it becomes possible to reach a longer distance or obtain higher performance with the same power, and it also becomes possible to consume less power when obtaining the same performance over the same distance.

[0072] In FIG. 4b, when the UE moves to the third area (130), if the 5G Implicit Deregistration Timer for the UE expires in the third area (130), which is outside the coverage of the 5G RAN and means a location inside the coverage of the 6G RAN, the 5G network can change the UE to a DERGEISTERED state. The 5G network can delete information recorded below the 5G UEID from the information of the 5G UDM. In the third area (130), the UE can perform a Periodic Search for the 5G network.

[0073] In one embodiment, the UE may apply the same Splitting method as in the second area (120) in the first area (110) or the third area (130), but may recognize that the available RAN has been reduced to one and transmit using only one RAN.

[0074] FIGS. 5A and 5B illustrate an example of an operation using aggregation in the uplink when a UE moves in a 6G network as a network signaling flow.

[0075] Specifically, FIGS. 5a and 5b illustrate an example of a network signaling flow when the UE moves in the order of a third area (130), a second area (120), and a first area (110).

[0076] In a third area (130) that is outside the coverage of the 5G RAN and within the coverage of the 6G RAN, the 6G Mobility status of the UE may be in a REGISTERED / CONNECTED state. The UE is in a state where it can currently send and receive traffic via 6G or send and receive traffic at any time. At this time, the network's UDM (5G UDM and / or 6G UDM) stores 5G information and 6G information, and the 6G information may include at least one of the following: 6GUEID, - mapped 5GUEID, - 6G AMF ID, - 6G PDU Session, - 6G SMF ID.

[0077] At this time, in the third area (130), the 5G Mobility status of the UE may be one of REGISTERED / IDLE / UE Unreachable or DEREGISTERED. The UE performs a Periodic Search process to periodically search for a 5G network, and when a 5G network is found, it may attempt to register and connect. If the periodic search period is too short, excessive power waste may occur, and if the periodic search period is too long, the in-coverage detection time may be delayed, which may reduce efficiency.

[0078] When a UE enters a second area (120) which refers to a location within the coverage of a 5G RAN and the coverage of a 6G RAN, the UE can perform a 5G network search and send a Registration Request to the 5G Core through the discovered 5G RAN. At this time, the UE may include at least one of the following information in the Registration Request: Dual Registration Capability, 5G UEID, (mapped 6G UEID). Subsequently, the 5G AMF that receives the Registration Request transmitted by the UE through the 5G RAN can transmit and receive the 5G Registration Request and 5G Registration Response with the 5G UDM and store the mapped 6G UEID and 5G AMF ID, which are information of the 5G UEID, in the 5G UDM.

[0079] After the above 5G Registration process, the UE may also proceed with the 5G PDU Session setup process. At this time, the UE may include at least one of the following information in the above 5G PDU Session setup process: Dual Registration Capability, 5GUEID, 5G PDU Session ID, and mapped 6G PDU Session. When the PDU Session setup request sent by the UE arrives at the 5G AMF via the 5G RAN, the 5G AMF can obtain the 5G SMF ID by using the mapped 6G PDU Session ID for the 6G UEID mapped to the 5G UEID as the mapped 6G SMF ID, since the 5G AMF learned the 6G SMF ID of the mapped 6G PDU Session for the 6G UEID mapped to the 5G UEID during the process of verifying the 5G UDM and subscription data earlier.

[0080] Subsequently, the 5G AMF sends a PDU Session request to the 5G SMF to recognize that the 5G PDU Session and the 6G PDU Session are linked, and can proceed with the necessary 5G data routing setup with the 5G UPF. Subsequently, the 5G SMF can send a 5G PDU Session setup response to the UE via the 5G AMF and 5G RAN. At this time, the 5G SMF can also update information regarding the PDU Session (information such as the Dual Registration Capability, 5GUEID, 5G PDU Session ID, mapped 6G PDU Session, etc.) to the 5G UDM.

[0081] Subsequently, the UE becomes able to exchange User Traffic through the 5G RAN to the 5G UPF. Since the existing UE was able to exchange User Traffic through the 6G RAN to the 6G UPF, the UE becomes capable of exchanging User Traffic simultaneously through these two paths.

[0082] The UPF separates downlink traffic and transmits it to the 5G RAN and 6G RAN, and the UE can aggregate the data received from the 5G RAN and 6G RAN. At this time, the UPF can determine the traffic transmission ratio between the 5G RAN and 6G RAN based on the throughput through the UE and each of the 5G RAN and 6G RAN. Downlink throughput can be increased by the aggregation of traffic transmitted through multiple networks.

[0083] Similarly, the UE can separate uplink traffic and transmit it to the 5G RAN and 6G RAN, and the UPF can aggregate the data received from the 5G RAN and 6G RAN. The UE receives information such as SNR, Coding Rate, and Required Power (PWR) from each of the 5G RAN and 6G RAN, and based on this information, can determine the traffic transmission ratio to each of the 5G RAN and 6G RAN based on the performance (throughput or RTT) that can obtain maximum performance within the UE's Power Limit.

[0084] In one embodiment, the UE can receive at least one of information such as the signal-to-noise ratio (SNR), coding rate, and required power (PWR) from each of the 5G RAN and the 6G RAN.

[0085] In one embodiment, the UE can measure the information (information such as signal-to-noise ratio (SNR), coding rate, and required power (PWR)) and the performance from the UE to the UPF (at least one of UE-to-UPF throughput and round trip time (RTT)).

[0086] In one embodiment, the UE can determine the traffic transmission ratio to each of the 5G RAN and 6G RAN based on the measured information and the measured performance from the UE to the UPF so as to obtain maximum performance within the UE's Power Limit limit.

[0087] In one embodiment, the UE can transmit traffic to the 5G RAN and the 6G RAN, respectively, using a dynamic splitting method based on a determined traffic transmission rate.

[0088] The UE can determine the traffic transmission ratio to each 5G RAN and 6G RAN by simultaneously considering the performance to each RAN as well as the performance with the UPF (throughput or RTT). The above ratio can be applied to each traffic flow.

[0089] The UE can determine semi-static time allocation coordination between the 5G RAN and the 6G RAN to be used for a certain period based on the traffic transmission ratio determined in this way. In one embodiment, according to the above determination, all Uplink traffic can be transmitted through the 5G RAN during the time allocated to the 5G RAN, and all Uplink traffic can be transmitted through the 6G RAN during the time allocated to the 6G RAN. In one embodiment, according to the above determination, all Uplink traffic can be transmitted through the 6G RAN during the time allocated to the 6G RAN, and all Uplink traffic can be transmitted through the 5G RAN during the time allocated to the 5G RAN. Since the UE has the ability to transmit traffic to multiple RANs simultaneously, it possesses resources such as antennas for this purpose; by concentrating these resources on a single RAN at a certain point in time, it becomes possible to reach a longer distance or obtain higher performance with the same power, and it also becomes possible to consume less power when obtaining the same performance over the same distance.

[0090] In FIG. 5b, when a UE moves to the first area (110), which is outside the coverage of the 6G RAN and means a location inside the coverage of the 5G RAN, if the 6G Implicit Deregistration Timer for the UE expires in the first area (110), the 6G network can change the UE to a DERGEISTERED state. The 6G network can delete information recorded below the 6G UEID from the information of the 6G UDM. In the first area (110), the UE can perform a Periodic Search for the 6G network.

[0091] In one embodiment, the UE may apply the same Splitting method as in the second area (120) in the first area (110) or the third area (130), but may transmit using only one RAN by recognizing that the available RAN has been reduced to one.

[0092] FIG. 6 is a block diagram showing an example of a terminal configuration according to one embodiment of the present disclosure.

[0093] As illustrated in FIG. 6, the terminal of the present disclosure may include at least one of a processor (630), a transceiver (610), or a memory (620). However, the components of the terminal are not limited to the examples described above. For example, the terminal may include more components or fewer components than the components described above. Furthermore, at least one of the processor (630), the transceiver (610), and the memory (620) may be implemented in the form of a single chip.

[0094] According to one embodiment, the processor (630) can control a series of processes that allow the terminal to operate according to the embodiment of the present disclosure described above. The processor (630) may include at least one processor, and the processor (630) can perform transmission and reception operations of the terminal in a wireless communication system applying the operation of the present disclosure described above by executing a program stored in memory (620).

[0095] The transceiver (610) can transmit and receive signals with a base station. The signals transmitted and received with the base station may include control information and data. The transceiver (610) may be composed of an RF transmitter that up-converts and amplifies the frequency of a transmitted signal, and an RF receiver that amplifies a received signal with low noise and down-converts the frequency. However, this is merely an example of the transceiver (610), and the components of the transceiver (610) are not limited to an RF transmitter and an RF receiver. Additionally, the transceiver (610) can receive a signal through a wireless channel and output it to a processor (630), and transmit the signal output from the processor (630) through a wireless channel.

[0096] According to one embodiment, the memory (620) can store programs and data necessary for the operation of the terminal. Additionally, the memory (620) can store control information or data included in signals transmitted and received by the terminal. The memory (620) may be composed of a storage medium or a combination of storage media such as ROM, RAM, hard disk, CD-ROM, and DVD. Additionally, the memory (620) may be a plurality of units.

[0097] Methods according to the embodiments described in the claims or specification of the present invention may be implemented in the form of hardware, software, or a combination of hardware and software.

[0098] When implemented as software, a computer-readable storage medium storing one or more programs (software modules) may be provided. One or more programs stored on the computer-readable storage medium may be configured for execution by one or more processors within an electronic device. One or more programs may include instructions that cause the electronic device to execute methods according to embodiments described in the claims or specification of the present invention.

[0099] Such programs (software modules, software) may be stored in random access memory, non-volatile memory including flash memory, ROM (Read Only Memory), Electrically Erasable Programmable Read Only Memory (EEPROM), magnetic disc storage devices, Compact Disc-ROM (CD-ROM), Digital Versatile Discs (DVDs), or other forms of optical storage devices, magnetic cassettes. Alternatively, they may be stored in memory composed of some or all of these. Additionally, each constituent memory may include multiple units.

[0100] In addition, the above program may be stored on an attachable storage device that can be accessed via a communication network such as the Internet, Intranet, Local Area Network (LAN), Wide LAN (WLAN), or Storage Area Network (SAN), or a combination thereof. Such a storage device may be connected to a device performing an embodiment of the present invention through an external port. Additionally, a separate storage device on a communication network may be connected to a device performing an embodiment of the present invention.

[0101] In the specific embodiments of the present invention described above, the components included in the invention are expressed in a singular or plural form according to the specific embodiments presented. However, the singular or plural expression is selected to suit the situation presented for convenience of explanation, and the present invention is not limited to singular or plural components; even if a component is expressed in the plural form, it may be composed in the singular form, or even if a component is expressed in the singular form, it may be composed in the plural form.

[0102] Meanwhile, although specific embodiments have been described in the detailed description of the present invention, it is understood that various modifications are possible within the scope of the present invention. Therefore, the scope of the present invention should not be limited to the described embodiments, but should be defined by the claims set forth below as well as equivalents thereof.

Claims

1. A method of a terminal registered at a first base station in a wireless communication system, A step of receiving a first message including first demand power information from the first base station; When the above terminal is registered with a second base station, the step of receiving a second message including second requested power information from the second base station; and A method characterized by including the step of determining a traffic transmission rate for at least one of the first base station and the second base station based on the first message and the second message when the terminal is registered with the second base station.

2. A method according to claim 1, further comprising the step of transmitting traffic to at least one of the first base station and the second base station based on the traffic transmission ratio.

3. The method according to claim 1, wherein the first message or the second message further comprises at least one of a signal-to-noise ratio (SNR) and a coding rate.

4. A method according to claim 1, wherein the traffic-dedicated ratio is determined based on the performance from the terminal to the UPF (user plane function).

5. In Paragraph 1, A method further comprising the step of re-determining the traffic transmission rate as the terminal moves from an area included in the coverage area of ​​the first base station to an area included in the coverage area of ​​the second base station.

6. In Paragraph 1, A method further comprising the step of determining a semi-static time allocation adjustment to be used for a certain period at least one of the first base station and the second base station based on the above traffic transmission ratio.

7. In Paragraph 1, If not registered at the second base station, a step of periodically searching for the second base station; and A method further comprising the step of transmitting a registration request message to the second base station when the second base station is found.

8. A method according to claim 6, wherein the registration request message comprises at least one of dual registration capability, a terminal identifier of a second base station, and a mapped terminal identifier of a first base station.

9. In Paragraph 6, A method further comprising the step of transmitting a message for PDU (packet data unit) session setup to the second base station when the terminal is registered with the second base station.

10. In Paragraph 4, A method further comprising the step of deregistering the registration between the first base stations when moving out of the area included in the coverage of the first base station.

11. In a terminal registered at a first base station in a wireless communication system, Transmitter / receiver; and It includes at least one processor; and the at least one processor, Receive a first message including first demand power information from the first base station, and When the above terminal is registered with the second base station, it receives a second message including second requested power information from the second base station, and A terminal configured to determine a traffic transmission rate for at least one of the first base station and the second base station based on the first message and the second message when the terminal is registered with the second base station.

12. In paragraph 11, the above at least one processor is, A terminal further configured to transmit traffic to at least one of the first base station and the second base station based on the above traffic transmission ratio.

13. A terminal according to claim 11, wherein the first message or the second message further comprises at least one of a signal-to-noise ratio (SNR) and a coding rate.

14. A terminal according to paragraph 11, wherein the traffic-dedicated ratio is determined based on the performance of the UPF (user plane function) from the terminal.

15. In paragraph 11, the above at least one processor is, A terminal further configured to redetermine the traffic transmission rate as the terminal moves from an area included in the coverage area of ​​the first base station to an area included in the coverage area of ​​the second base station.

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